Simplify DataFrame => Matrix?

[johnmyleswhite]

I'm really glad to have this package. Thanks for creating it!

The API is still in flux, but I believe the following should now work if you're interested in shrinking your README file:

iris = data("datasets", "iris")
features = matrix(iris[:, 2:5])
labels = iris[:, "Species"]

We're also debating how to handle providing formula interfaces for models like decision trees so that you could just write:

build_tree(Species ~ Petal_Length + Petal_Width, iris)

If you have requests there, please let me know.

[bensadeghi]

Hi John,
Thanks, I'm glad that you like it!! Hopefully I'll be able to implement a more versatile algorithm, one with pruning (C4.5?). And making the tree builders more flexible by providing formula interfaces would be awesome!! I still need to do a bit of catching up with DataFrames, and the new pkgs like Resampling, and then I'll start thinking about how the trees could fit in with the LM style formulas. And thanks for the readme reduction tips.
Cheers,
Ben